Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already provide idempotentHint=trueaimanid=false and destructiveHint=false, and the description's 'Update' aligns with readOnlyHint=false. The phrase 'privacy-filtered project metadata' adds a small behavioral hint about sanitization, but the description does not explain idempotency semantics, side effects, or required permissions. No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, front-loaded sentence with no redundant wording or filler. It is concise and well-structured, though brevity comes at the expense of substantive guidance.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 6-parameter mutation tool with a nested object and no output schema, the description is too sparse. An agent cannot determine the expected payload semantics, response format, or when this tool should be chosen over related validation/writing tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate for undocumented parameters, but it mentions none of the six parameters. It does not clarify the meaning of projectId, nodeId, details, sessionId, executionId, or idempotencyKey, nor how the nested details object should be populated.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific action ('Update') and resource ('hosted validate node'), and adds that it uses 'privacy-filtered project metadata.' However, 'validate node' is domain-specific and not clearly differentiated from siblings like validate_project_graph or validation_write, making the purpose somewhat vague without additional context.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives. There are no prerequisites, exclusions, or comparison to sibling tools such as validate_project_graph, validation_write, or update_scanner.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.